Stock Stereo Won't Power On, (CD/Tape Combo Player with Amp) Options

[MegaMac]

Alright, guys. I have a problem.

I have an original Toyota stereo as seen here: http://i00.i.aliimg.com/img/pb/987/270/614/614270987_491.jpg

Since that particular system requires an amplifier, I purchased a stock one from a member on here, identical to the one seen here: http://i.ebayimg.com/00/s/MTIwMFgxNjAw/z/y...Q/$_57.JPG

All cables are present and all connections fit and are tight. No missing prongs or severed wires. Once everything was ready to go I turned the car on and I heard the laser cycle, but the player did not turn on. I pressed the power button, and nothing. I also did the button combination to unlock Toyota radios, but it was still unresponsive. What am I doing wrong? Did I miss something? All fuses that relate to the radio and dash are fine as well. It seems to be getting power, but man, I am at a loss.

Any help on this would be greatly appreciated!

[azian_advanced]

The anti-theft system would show "HELP" on the display and the key indication on the stereo would glow red.
Since it's not doing that, and the stereo reacts or has power when plugged, then my guess is the radio is bad.

[MegaMac]

The anti-theft system would show "HELP" on the display and the key indication on the stereo would glow red.
Since it's not doing that, and the stereo reacts or has power when plugged, then my guess is the radio is bad.

Would it do that despite being from an entirely different vehicle? I'm pretty sure that form of anti-theft was implemented later, where the stereo communicates with the BCM and matches the VIN, but the unresponsiveness does sound like it.